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qaws [65]
3 years ago
14

I need help question 13

Chemistry
1 answer:
kondor19780726 [428]3 years ago
4 0
The answer will be B
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What element has an electron<br> configuration of 2-8-8-1:
Afina-wow [57]
Ойлголоо, уучлаарай Ойлголоо, уучлаарай /; coo
4 0
3 years ago
A student was asked to determine the densities of the four metals listed. The student was asked to determine the density of an u
Iteru [2.4K]

Answer:

D is correct

Explanation:

because

we know that

density of lead is 11.36 g/cm3

and

density of tin is 7.31 g/cm3

so..

density of alloy by mixing 50/50

=(11.36+7.31)/2 g/cm3

=18.67/2 g/cm3

=9.33 g/cm3

5 0
3 years ago
What is the final pressure (expressed in atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final
maksim [4K]

Hey there!:

V1 = 3.05 L

V2 = 3.00 L

P1 = 724 mmHg

P2 = to be calculated

T1 = 298 K

T2 = 273 K

Therefore:

P1*V1  / T1  = P2*V2 / T2

P2 = ( P1*V1 / T1  )   * T2 / V2

P2 = 724 * 3.05 * 273 / 298 * 3.00

P2 = 602838.6 / 894

P2 = 674.31 mmHg

1 atm ----------- 760 mmHg

atm ------------- 674.31 mHg

= 674.31 * 1 / 760

= 0.887 atm

Hope this helps!

5 0
4 years ago
The chemical properties of a substance can only be observed when it is changed into a different substance. True or False
HACTEHA [7]
I am pretty sure that the answer is true
6 0
3 years ago
Read 2 more answers
Is this an oxidation reaction? Why or why not?
murzikaleks [220]
The oxidation state of Hydrogen in reactant side is 0 and that in product side is +1. Hence the reaction is oxidation.
7 0
3 years ago
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